In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Your body is creating and killing about 2.4 million red blood cells per second.
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A cow produces around 200,000 glasses of milk in her lifetime.
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The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
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